Sampling sites; the background maps were extrapolated from Google using the function get_map from ggmap package (Kahle and Wickham 2013).

  Part of: Ciaschetti G, Di Musciano M, Pirone G, Di Cecco V, Pace L, Frattaroli AR (2020) A new pioneer association of detrital substrata of the hilly and low-mountain belts in Central Apennines (Italy). Plant Sociology 57(1): 75-84.